This book gives an overview of recent findings on the mitigation of gas emission from landfills and sludge processing. Special attention is given to methane and the migration of POPs, heavy metal ions, ammonia and nitrate from landfills to the water-soil system and to the atmosphere. Strategies for mitigating the impact of pollution on ecosystems are also discussed. This book contains thirty-one selected papers presented at an International Workshop on Management of Pollutant Emission from Landfills and Sludge, Kazimierz Dolny, Poland,16-19 September 2006.The papers included are arranged in seven chapters such as: Mitigation of gas emission from landfills; Pathway of POPs in waste, wastewater and landfill leachate; Migration of heavy metals from waste disposal sites and sewage sludge; Minimization of the impact of waste and sewage sludge on the environment; Chemical composition and treatment of landfill leachate; Possibility of practical utilization of waste and sewage sludge; and, Miscellanea. The book will be of value to academics and professionals working in the area of control of pollutant emissions.